Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Brake Pressure Modulator Valve (BPMV) Replacement

Removal Procedure

1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.





2. Remove the EHCU(1) shield bolts and shield.
3. Disconnect the electrical connectors from EBCM.
4. Disconnect the electrical connector from the combination valve.
5. Remove the front and rear brake pipes (from master cylinder) from the combination valve.
6. Remove the right front, left front and rear brake pipes from the tube adapters.





7. Remove the bolts that fasten the EHCU bracket to the frame.





8. Remove the EHCU from the frame.
9. Remove the bolts retaining the BPMV form the bracket.





10. Remove the four T-25 TORX(R) bolts (1) that fasten the EBCM to the BPMV.
Remove the EBCM (2) from the BPMV (4).
Removal may require a light amount of force.

Important: Do not use a tool to pry the EBCM or the BPMV.

11. Remove the Allen bolts (8) from the combination valve.
12. Remove the combination valve (9).
13. Remove the two transfer tubes (10).

Installation Procedure

Important:
^ Do not reuse the transfer tubes. Always install NEW transfer tubes.
^ Do not reuse the old mounting bolts. Always install NEW mounting bolts with the new EBCM.
^ Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.





1. Install the NEW transfer tubes (10) into the combination valve into the combination valve (9).
2. Install the combination valve onto the BPMV (4).

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the Allen bolts (8) that fasten the combination valve (9) to the BPMV (4).
Tighten the Allen bolts to 8 Nm (6 ft. lbs.), then to 16 Nm (12 ft. lbs.).
4. Install EBCM (2) onto BPMV (4).
5. Install the new EBCM bolts (1).
Tighten the bolts to 5 Nm (39 inch lbs.) in an X-pattern.
6. Install BPMV (4) to bracket.
7. Install the BPMV (4) to bracket retaining bolts.
Tighten the bolts to 9 Nm (7 ft. lbs.).
8. Install the EHCU to the vehicle frame.
Tighten the bolts to 12 Nm (9 ft. lbs.).
9. Install the right front, left front and rear brake pipes to the tube adapters.
^ Tighten the front brake pipe fittings to 20 Nm (16 ft. lbs.).
^ Tighten the rear brake pipe fitting to 30 Nm (22 ft. lbs.).
10. Install the front and rear brake pipes (from master cylinder) to the combination valve.
Tighten the brake pipe fittings to 30 Nm (22 ft. lbs.).
11. Connect the electrical connector to the combination valve.
12. Connect the electrical connectors to the EBCM.
13. Install the EHCU shield.
Tighten the bolts to 12 Nm (8 ft. lbs.).
14. Lower the vehicle.
15. Bleed the brake system. Refer to Automated Bleed Procedure.

Important: Verify that the combination valve metering rod is depressed during bleeding.

16. Return to Diagnostic System Check. Refer to Diagnostic System Check - ABS.